Warning : export-to-text.php on line 17

Hi I get this message:

Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /hosting/www/hotelbalear.com/public/wp-admin/admin-header.php:35) in /hosting/www/hotelbalear.com/public/wp-content/plugins/export-to-text/export-to-text.php on line 17

I´m using WPML plugin for translation, could ve that ?

Much thanx,
Pancho

http://wordpress.org/extend/plugins/export-to-text/